To depict the fantasy world of our heroine's mental landscape, we built an 85-meter-long set of a school hallway and courtyard. We equipped the set with a flexible floor that was made to undulate by staff members standing on either side as the heroine ran the length of the set. Filming was done with a handheld camera to heighten the realism and physicality of her journey. Wind was also an important element of expression in the production. In the school corridor, fluttering strip curtains were used to create the impression of a headwind, and the door leading to the courtyard was deformed to express the strength of the wind. In the courtyard outside, wisteria and cherry blossoms show the headwind changing a tailwind as our heroine runs, and wire action was seamlessly incorporated into the sequence to dynamically depict her joyful reunion with her friend.